3/2 fractional quantum Hall plateau in a single layer two-dimensional electron gas

ORAL

Abstract

In a single layer two-dimensional electron gas, we observed a new even-denominator fractional quantum Hall plateau quantized at (h/e^2 )/(3/2) under confinement, at a bulk filling factor of 5/3. This unexpected plateau develops below 300 mK with a quantization of 0.02%. The conductance transmitting through the confined region is also quantized at 3/2 e^2/h, and the conductance of 1/6 e^2/h is backscattered. A new elemental excitation with e/6 effective charge, the further fractionalization of the e/3 quasi-particles, through topological soliton and topological phase transition is proposed as a tentative explanation.

*The work was funded by NBRPC (2015CB921101, 2015CB921102), NSFC (11674009, 11274020, 11322435, 11534001), Gordon and Betty Moore Foundation (GBMF4420), National Science Foundation MRSEC (DMR-1420541), Keck Foundation.

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Presenters

  • Xi Lin

    • Peking University
    • Peking Univ

Authors

  • Xi Lin

    • Peking University
    • Peking Univ

  • Hailong Fu

    • Peking Univ

  • Yijia Wu

    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking Univ

  • Pujia Shan

    • Peking Univ

  • Pengjie Wang

    • Peking Univ

  • Zheyi Zhu

    • Peking Univ

  • Loren Pfeiffer

    • Electrical Engineering, princeton university
    • Department of Electrical Engineering, Princeton University
    • Princeton University
    • Princeton Univ
    • Electrical Engineering, Princeton Univ
    • EE, Princeton University

  • K West

    • Electrical Engineering, princeton university
    • Department of Electrical Engineering, Princeton University
    • Princeton University
    • Univ of Basel
    • Princeton Univ
    • Electrical Engineering, Princeton Univ
    • EE, Princeton University

  • Haiwen Liu

    • Department of Physics, Beijing Normal University
    • Center for Advanced Quantum Studies, Department of Physics, Beijing Normal University
    • Beijing Normal Univ

  • Xincheng Xie

    • International Center for Quantum Materials and School of Physics, Peking University
    • Peking University
    • International Center for Quantum Materials, Peking University
    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking Univ